Engineering & CPA Review Policy

Every spreadsheet published on SheetAtlas undergoes a multi-stage technical verification process before release:

• Formula Integrity Audit: Zero hardcoded totals; all calculation cells use native, unlocked Excel functions (`SUMIFS`, `IFERROR`, `ROUNDUP`, `INDEX/MATCH`, etc.) verified against `#REF!`, `#DIV/0!`, and `#VALUE!` errors.
• Zero Macro / VBA Guarantee: All workbooks are distributed strictly in standard `.xlsx` OpenXML format without macros, ensuring 100% enterprise security compliance.
• Standards Alignment: Construction and MEP calculators align with CSI MasterFormat and National Electrical Code (NEC) formulas; financial workpapers follow US GAAP and IFRS rollforward conventions.